I get that 159 gigatons of ice lost in Antartica means that about an average 1/2″ of ice over the 14 million sq km’s of land mass!
This is absurd to think that amt of ice loss over a huge land mass can be measure. I sincerely doubt they can measure the average snow depth in my back yard to a half an inch!

Antarctic ice is increasing almost everywhere excepting the West Antarctic Peninsula, so that is where the “green scientists” focus alarm. Most of the ice loss there is caused by eruptions from a series of under ice volcanoes, which doesn’t fit their talking points, so the focus is on the few points where ocean ice melting occurs. Since they are interested in melting ice they only show up at the end of summer to “document” local decreasing minimums, increasing winter ice maximums on the rest of the continent is of no interest.